I just nailed my first squirrel of this year... I found out a few weeks ago after missing way too many squirrels that the hex cap screws holding my scope onto my pellet rifle were loose (not good for aim). Last weekend I printed out a paper target and taped it to a board. I used my laser bore sight to get on the paper, then put some metal into the paper target to finish dialing it in. My shot group was not as tight as I'd like (I'm old), but the sight is dialed in good enough to drop the first squirrel I saw today with one shot.
The squirrels eat my pecans later in the season and I find that unacceptable. The first year I bought this rifle (Gamo) I nailed 4 or 5 squirrels, but nothing for the last year or two. I am now sighted in and ready for the tree rats.
JR